Webstart - Registering a custom file type

I'm trying to use a jnlp file to register a custom file type (*.flf) with Windows XP / Vista. I have added the following line to the jnlp file near the bottom (right by the main class tag):
<association extensions="flf" mime-type="application-x/flf" />On some sites I have found this listed as mime type first and extensions second and also with just a > no the end without a />. Neither seems to be working. I also found it listed inside the information section but this didn't work either.
Am I missing something blindingly obvious? For reference heres the entire jnlp file
<?xml version="1.0" encoding="utf-8"?>

<jnlp codebase="http://ukpcw032:8080/jclock" href="jFreelancer.jnlp">
    <information>
       <title>CVC Freelancer Time Sheets</title>
       <vendor>CVC</vendor>
       <description>CVC Freelancer Time Sheets - Program to allow freelancers to generate their time sheets for submission.</description>
       <description kind="short">Fee</description>
       <offline-allowed/>
       <icon href="images/overview.png" />
       <icon kind="splash" href="images/splash.jpg" with="365" height="260"/>
       <shortcut>
       <desktop/>
       <menu submenu="CVC"/>
       </shortcut>
     </information>
     <resources>
       <j2se version="1.6"/>
       <jar href="jFreelancer.jar"/>
       <jar href="libs/mysql-connector-java-5.1.6-bin.jar"/>
       <jar href="libs/iText-2.1.3.jar"/>
       <jar href="libs/DateChooser.jar"/>
       <jar href="libs/dsn.jar" />
       <jar href="libs/imap.jar" />
       <jar href="libs/pop3.jar" />
       <jar href="libs/smtp.jar" />
       <jar href="libs/mailapi.jar" />
     </resources>
     <security>
       <all-permissions/>
     </security>
     <association extensions="flf" mime-type="application-x/flf" />
     <application-desc main-class="freelancer.UserLogin"/>
</jnlp>

That JNLP file is invalid. Try this variant..
<?xml version="1.0" encoding="utf-8"?>

<jnlp codebase="http://ukpcw032:8080/jclock" href="jFreelancer.jnlp">
    <information>
       <title>CVC Freelancer Time Sheets</title>
       <vendor>CVC</vendor>
       <description>CVC Freelancer Time Sheets - Program to allow freelancers to generate their time sheets for submission.</description>
       <description kind="short">Fee</description>
       <icon href="images/overview.png" />
       <icon kind="splash" href="images/splash.jpg" width="365" height="260"/>
       <offline-allowed/>
       <shortcut>
       <desktop/>
       <menu submenu="CVC"/>
       </shortcut>
     <association extensions="flf" mime-type="application-x/flf" />
     </information>
     <security>
       <all-permissions/>
     </security>
     <resources>
       <j2se version="1.6"/>
       <jar href="jFreelancer.jar"/>
       <jar href="libs/mysql-connector-java-5.1.6-bin.jar"/>
       <jar href="libs/iText-2.1.3.jar"/>
       <jar href="libs/DateChooser.jar"/>
       <jar href="libs/dsn.jar" />
       <jar href="libs/imap.jar" />
       <jar href="libs/pop3.jar" />
       <jar href="libs/smtp.jar" />
       <jar href="libs/mailapi.jar" />
     </resources>
     <application-desc main-class="freelancer.UserLogin"/>
</jnlp>I also have a demo of the [FileOpen/SaveService|http://pscode.org/jws/api.html#fs] that you might also test, but I just noticed that launch file is also slightly invalid. I have seen it work on Win XP using Java 1.6 though.
Edit 1:
I used YAXV to validate the launch file against an XSD that is based on the DTD distributed by Sun. YAXV is freeware, and I highly recommend* using it to check the JNLP file(s) for any JWS launch that does not work as expected.
* OK - I wrote it, so I might be biased. ;-)
Edited by: AndrewThompson64 on Aug 12, 2008 11:05 PM

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Webstart - Registering a custom file type

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